The FM modules with USB function of Vire Silicon. Co Ltd is an excellent miniature FM module with USB input and digital display for functions. It is available as assembled board with remote.The VIRE-FM 01C FM –USB Module is available as readymade assembled board. Its output can be connected to power amplifier or into the amplifier of VCD player, Car stereo etc.The module has the following important features Item .No.VIRE-FM-003-01

Use a 10 K Lin dual volume control between the output lines (L and R) of the module and the amplifier. Set minimum volume (2 to 4) in the module using remote and adjust 10 K pot to get clear sound from the speaker. Then increase the volume using remote to the required level. The module can give 1 to 50 range volume.

Antenna

Antenna is necessary if the signal strength is weak .Connect 30 cm plastic wire to the point ANT on the PCB

5 Volt regulated power supply is necessary for the circuit. Make a regulated power supply with IC 7805 with 1000 uF filter capacitor. If the power supply is not well regulated or with ripples, performance of the circuit will be poor.

Remote less operation

On the PCB, connections V+, PM, CH V-, P etc are given to connect membrane switches for manual operation.

The FM board has delicate components. Connect wires carefully. To get FM stations programmed, first use a long plastic wire as antenna. There is a point in the board ANT to connect antenna. If you scan FM stations, it will automatically search all the available stations and save the stations as 1, 2, .3 etc. After that a short piece of wire 30 cm is sufficient for antenna. Another important thing is power supply. Use a 5 volt regulated supply with heat sink for the board and 12 volt 500 mA for amplifier. Use a10 K Log dual pot as volume control. If there is a hum from the speaker, not connect the Gnd wire of output (that is output to volume control. connect only two lines) to the volume control.
The virenet also released boards having front panel with fixed USB socket and SD card reader, mp4, video boards etc. All these boards are available in the market.

Article in Word format is available in Design Note page

D.Mohan kumar

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About D.Mohankumar

D. Mohan Kumar M.Sc., M.Phil, is an Associate Professor from Trivandrum, Kerala, India. He has been guiding Post Graduate students in Animal Science research for the last 25 years in several premier institutions in Kerala, India. He is an avid electronics enthusiast and has been designing circuits for the past 20 years. In this period he has supported many electronics/electrical engineering students in their final year projects. He is a regular contributor to Electronics For You magazine which is South Asia’s largest circulating electronics magazine published from New Delhi.
He is also contributing articles in http://www.elprocus.com and http://www.engineersgarage.com/

USB port working properly and also the remote,but ‘mode’ not changed to radio.When drive not connected in USB port the radio not working that is no sounds[mute],the led display shows ‘no’and the remote also not working.

I have connected the board as per the connection mentioned in your diagram. But Sound from USB is not comming. FM is good. Checked with Diff. pen drive still not working. Checked with different speaker(Amplifier) also. Same issue. Checked with a head phone directly connecting. But FM is good and usb playing but no sound. Shows the song name. Ultimately brought another new board but same issue there. Re-verified USB connections. Still not working. Please help.

The New board of vire is with aux connection and aux vol and tone is also controlling , So the new board along with an amplifier of Dual 4440 or STK 4141 can be used to build an good receiver amplifier with digital controls instead of potentiometers
I have personally used a dual 4440 car stereo old board with New Vire module with panel and an 12volt 5 ampere SMPS + LM7111 5V regiuator. it is nicely working with my 32 inch LED tv as AUX input,

Sir, pls let me know.. how can we connect sd card socket. Please explain connection diagram of the same..!! Also I want to power it via nokia battery. Please comment for that and provide circuit with charging connection via USB.